Ravel: "Gaspard de la nuit" performed by Martha Argerich

This interpretation is similar to that of Argerich's sublime recording for Deutsche Grammophon issued on 1967.10.31, but it's exclusive to this performance prerecorded for some continental telecast or other in the early to mid-'70s. If anybody's familiar with these videos' provenance, feel free to apprise me, because I haven't a clue.

"Ondine"
https://www.youtube.com/watch?v=Rj8cBmWZhP0

"Le Gibet"
https://www.youtube.com/watch?v=xNQ2CLhu6wU

"Scarbo"
https://www.youtube.com/watch?v=XQeE5AxutO4